Divestitures and Other Transactions Divestitures and Other Transactions - Integration and Separation Costs (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Integration and Separation Costs	$ 152	$ 253	$ 694	$ 697

Integration and separation costs includes costs incurred to prepare for and close the Merger, post-Merger integration expenses and costs incurred to prepare for the Intended Business Separations. These costs primarily consist of financial advisory, information technology, legal, accounting, consulting and other professional advisory fees associated with preparation and execution of these activities.

No definition available.

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Namespace Prefix:	dd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration